The function of the hydraulic cylinder of Shandong excavator is to convert the mechanical energy output by the engine into the hydraulic energy, and distribute the mechanical energy to the actuator through the main control valve, so as to realize every action of the excavator. In the maintenance of mechanical cylinder, it is often seen that there are some honeycomb holes caused by cavitation on the inner wall of hydraulic cylinder, piston or piston rod surface.

　　空化是在高速流动和压力变化的条件下，金属表面与流体接触产生的空化现象。下面是小编介绍的防止开挖油缸空化的方法。

　　Cavitation is a kind of cavitation phenomenon caused by the contact between metal surface and fluid under the condition of high-speed flow and pressure change. The following is the method to prevent the cavitation of the excavation cylinder introduced by the editor.

　　机械油缸的气蚀损伤相当大，它会导致油缸表面发黑，甚出现支撑环、密封环烧焦的现象，使油缸产生内部泄漏。当气蚀和其他类型的腐蚀一起发生时，会出现几次甚几十次的加速腐蚀，主要部件的气缸，从而严重影响机械的正常使用。因此，有必要防止气蚀现象的发生。

　　The cavitation damage of the mechanical oil cylinder is quite large, which will cause the cylinder surface to blacken, even the phenomenon of burning the support ring and seal ring, which will cause the internal leakage of the oil cylinder. When cavitation and other types of corrosion occur together, there will be several or even dozens of accelerated corrosion, which will seriously affect the normal use of the machine. Therefore, it is necessary to prevent cavitation.

　　如何防止山东挖掘机油缸汽蚀

　　How to prevent cylinder cavitation of excavator in Shandong Province

　　对于汽蚀我们应该采取的预防措施是:严格选用液压油，严格按照液压油的标准选用。选用液压油能有效防止液压系统在工作过程中产生气泡;为保持各液压元件接头面的正常间隙，在制造或修理液压缸主要部件时，应按总成尺寸的下公差极限进行装配。

　　The preventive measures we should take for cavitation are: strictly select hydraulic oil, strictly select according to the standard of hydraulic oil. The selection of high quality hydraulic oil can effectively prevent the hydraulic system from producing bubbles in the working process; in order to maintain the normal clearance of the joint surface of each hydraulic component, when manufacturing or repairing the main components of the hydraulic cylinder, the assembly shall be carried out according to the lower tolerance limit of the assembly size.

　　这可以很好地减少汽蚀的发生;保持油温正常的关键是防止油温过高，减少液压冲击，合理设计散热系统，防止油温过高。如有异常，应查找原因，及时排除。

　　The key to keep the oil temperature normal is to prevent the oil temperature from being too high, to reduce the hydraulic impact, to design the heat dissipation system reasonably and to prevent the oil temperature from being too high. If there is any abnormality, find out the cause and eliminate it in time.

　　同时，应及时维护冷却系统，使冷却系统温度保持在适当的范围内，以减少气泡破裂时释放的能量。必要时，可将油缸拆成油管，使液压油溢流，以达到单缸排气的效果。

　　At the same time, the cooling system should be maintained in a timely manner to keep the temperature of the cooling system within a proper range, so as to reduce the energy released when the bubble breaks. If necessary, the oil cylinder can be disassembled into oil pipe to overflow the hydraulic oil, so as to achieve the effect of single cylinder exhaust.